A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6105-01-554-6087
NSN 6320-00-731-6134
NSN 6650-01-391-7527
NSN 5895-00-833-2525
NSN 6645-00-979-6824
NSN 5999-01-595-2106
NSN 5985-01-608-4382
NSN 6130-00-210-9983
NSN 6110-01-603-4571
NSN 6135-01-387-0754
NSN 6645-01-480-3962
NSN 5985-01-357-8907